Apologies to those people who got the "spam" email with the direct link to the puzzle PDF: becauseof my mistake, some of you from the US got the email 3 times

It is quite tricky to send email to more people these days: of course I should add the "opt-in" option with the account(this will happen) and put an "unsubscribe" link in the mail (will happen also)(but I've been lazy because I send outless than 1 email a year on average..).

Because the parent company ("Colocrossing") of my server provider ("ChicagoVPS") apparently hosts a lot of spam servers/networks,the IP address of calcudoku.org was on a "block list" that is used all over the place (the "Spamhaus SBL")(the IP just happened tobe too similar to that of the spamming servers).

My IP was changed to one that is not on this list (which explains why the server was unreachable for 20 minutes or so this afternoon CET)(some people/internet providers do lazy caching of these addresses, for them unfortunately the outage was/is longer).

The new IP apparently is on a Verizon blocklist (!). I requested for it to be removed, with full info, but all I got from Verizonwas that it was still blocked :-| From what I understand, they're a monopoly, so they couldn't care less anyway (?)

Add to that the need to set up reverse IP lookup properly, add an SPF record, sign messages with DKIM if at all possible, etc. etc.all thanks to the spammers

Many thanks for this special puzzle with the [edited because of spoiler] msg on it (no space for the [...], right?, unless the 11-, 28x, 16+ and 9+ cages could be thought as representing the [...]).

Happy 2015 for you and everyone in the site.

The "0" in the center, cage "109+" with 12 cells, is the largest cage I have worked with to the moment.

The curious thing is that I have sent the solution but the page tells me "You already submitted a book puzzle solution today", so no special circumstances for this extra prize (15 additional points), I am affraid I must wait until tomorrow, but in this case only 3 extra points will be really added (over the normal 12 points of the daily book puzzle) .

The curious thing is that I have sent the solution but the page tells me "You already submitted a book puzzle solution today",

How is this a curious thing? You did not expect this message?

(database is showing you submitted puzzle a2z3 ?)

Thank you, yes, I had sent that puzzle today, I should have reminded that once an extra puzzle is entered via a "book code" the program sets that limitation, even at the end of the year , well, will try it in a few minutes, I still have the code.